| Boxplot statistics | |||||
| Variable | lower whisker | lower hinge | median | upper hinge | upper whisker |
| Smokers | 2 | 3 | 3.5 | 5 | 7 |
| nosmokers | 2 | 3 | 4 | 4 | 5 |
| Boxplot Notches | |||
| Variable | lower bound | median | upper bound |
| Smokers | 2.76 | 3.5 | 4.24 |
| nosmokers | 3.63 | 4 | 4.37 |
| Boxplot Means | |||
| Variable | trimmed mean | unbiased SD | |
| Smokers | 3.78 | 1.4 | |
| nosmokers | 3.67 | 1.14 | |
